Ill. Admin. Code tit. 11, § 403.50
a) Grandstands
5) Automatic sprinklers shall be installed in all grandstands in the following locations:
b) Barns
1) Construction Classification Structures used as barns shall be classified as follows:
2) Size Limitations:
A) Buildings used as barns constructed after the adoption of these rules shall not exceed in area the values in the following table:
| Barn Size Limitations Maximum Building Area in Square Feet | ||
| Construction Class | Non-Sprinklered | Sprinklered |
| A | Unlimited | Unlimited |
| B | Not Permitted | 18,000 |
| C | Not Permitted | 12,000 |
4) Spacing Requirements:
A) Structures enumerated in Section 5.2 (11 Ill. Adm. Code Section 403.50(b)) constructed after the adoption of these rules shall be separated by the following minimum distances:
| Spacing Between Barns in Feet | |||
| Types of Facing-Walls | Masonry | ||
| Masonry | 25 | Noncombustible | |
| Noncombustible | 25 | 35 | Combustible |
| Combustible | 35 | 50 | 75 |
5) Fire Walls: Barns divided by a fire wall having at least two-hour fire resistance shall be considered as separate buildings in applying the size limitations of Section 5.22 (11 Ill. Adm. Code Section 403.50(b)(2))
6) Exits: Barns shall be designed so that there is a doorway leading directly outside within 100 ft. travel distance of all portions of the building. It shall be possible to exit from any point in the building in at least two directions; dead ends longer than 30 ft. shall not be permitted. Travel distance may be increased to 150 ft. when the barn is of masonry or masonry veneer construction and is protected by an automatic sprinkler system.
c) Sleeping Facilities
d) Roof Coverings
All track buildings shall have roof coverings meeting Underwriters Laboratories, Inc. requirements for Class C roofing or better.
e) Insulation
Track buildings shall not use combustible insulating materials installed so that the surface of the insulation is exposed.